Letter Canceling Unfilled Order

This is in reference to the cancellation of the order placed at your firm last month. Our customer has informed us that she can wait no longer for the merchandise we ordered from you on (date).

We are therefore canceling our purchase order #, which was contingent on delivery prior to (date).

Under the circumstances, we are certain that you will understand the necessity of our canceling this order. Please acknowledge us with the receipt of the letter. We regret for the cancellation, but we had no other option too, we hope you’ll understand our situation. Thank you.